I haven't heard too much about the Naples Air Center
I would seriously suggest you make use of the search function at the top of the page, you will find plenty to hear about on these schools, especially Naples Air Centre - all of it, not good!!
But if you are unable to use search function, here is my advice - don't go to NAC. I won't go into reasons, as it is in lots of previous posts on this forum, all available to you through the search function!
Don't forget if its ATPL you want to eventually acquire, to start groundschool the requirement is ICAO PPL. So if you are intent on going to US, you can even get FAA PPL at non JAA school for far cheaper cost and begin ground school in UK or US at your preference. Don't get sold the JAA PPL at these schools in the US if you don't necessarily need it.